/* ============================================================
   SeimiRender 官网 — 文档页样式
   ============================================================ */

.docs-layout {
  max-width: 1280px;
  margin: 0 auto;
  padding: calc(var(--nav-h) + 44px) 28px 100px;
  display: grid;
  grid-template-columns: 268px minmax(0, 1fr);
  gap: 56px;
  align-items: start;
}

/* ---------- 侧栏目录 ---------- */
.docs-side { position: sticky; top: calc(var(--nav-h) + 32px); max-height: calc(100vh - var(--nav-h) - 64px); }
.toc-box {
  border: 1px solid var(--border);
  border-radius: 14px;
  background: rgba(148, 178, 255, .03);
  padding: 18px 6px 14px;
  max-height: calc(100vh - var(--nav-h) - 110px);
  display: flex; flex-direction: column;
}
.toc-title {
  display: flex; align-items: center; gap: 8px;
  font-size: 12px; font-weight: 600; letter-spacing: .18em;
  color: var(--text-3); text-transform: uppercase;
  padding: 0 14px 12px;
}
.toc {
  overflow-y: auto; padding: 0 8px 6px 4px;
  display: flex; flex-direction: column; gap: 1px;
  scrollbar-width: thin;
}
.toc a {
  font-size: 13.5px; color: var(--text-3);
  padding: 6px 10px; border-radius: 8px;
  border-left: 2px solid transparent;
  line-height: 1.45;
  transition: color .15s, background .15s, border-color .15s;
}
.toc a.toc-2 { font-weight: 600; color: var(--text-2); }
.toc a.toc-3 { padding-left: 26px; font-size: 13px; }
.toc a:hover { color: var(--text-1); background: rgba(148, 178, 255, .06); }
.toc a.active {
  color: var(--text-1);
  background: rgba(79, 140, 255, .1);
  border-left-color: var(--brand-1);
}
.toc-gh {
  margin: 10px 12px 2px; padding: 10px 12px;
  border-top: 1px solid rgba(148, 178, 255, .1);
  font-size: 12.5px; color: var(--text-3); text-align: center;
}
.toc-gh:hover { color: var(--text-1); }

.toc-toggle {
  display: none;
  position: fixed; right: 20px; bottom: 84px; z-index: 90;
  width: 44px; height: 44px; border-radius: 50%;
  background: rgba(10, 16, 30, .92);
  border: 1px solid var(--border-strong);
  color: var(--text-1);
  align-items: center; justify-content: center;
  box-shadow: 0 10px 30px -8px rgba(0, 0, 0, .6);
}

/* ---------- 内容区 ---------- */
.docs-crumb {
  font-size: 13.5px; color: var(--text-3); margin-bottom: 26px;
}
.docs-crumb a:hover { color: var(--text-1); }
.docs-crumb span { margin: 0 8px; opacity: .5; }

.md { max-width: 860px; font-size: 15.5px; color: var(--text-2); }

.md h1 {
  font-size: clamp(28px, 3.6vw, 38px); line-height: 1.3;
  letter-spacing: -.015em; color: var(--text-1);
  margin: 0 0 8px; font-weight: 700;
  display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
}
.md h1 img { width: 40px; height: 40px; border-radius: 10px; box-shadow: 0 6px 20px -6px rgba(59, 130, 246, .55); }

.md h2 {
  font-size: 25px; color: var(--text-1); font-weight: 700;
  letter-spacing: -.01em; line-height: 1.35;
  margin: 68px 0 20px; padding-top: 30px;
  border-top: 1px solid rgba(148, 178, 255, .12);
}
.md h2:first-of-type { border-top: 0; padding-top: 0; margin-top: 40px; }
.md h3 { font-size: 19px; color: var(--text-1); font-weight: 650; margin: 44px 0 14px; letter-spacing: -.005em; }
.md h4 { font-size: 16.5px; color: var(--text-1); font-weight: 650; margin: 34px 0 12px; }

.md p { margin: 14px 0; }
.md strong { color: var(--text-1); font-weight: 650; }
.md a { color: #7db4ff; border-bottom: 1px solid rgba(125, 180, 255, .25); transition: border-color .15s, color .15s; }
.md a:hover { color: #a5ccff; border-bottom-color: rgba(165, 204, 255, .6); }
.md a[href^="http"]::after {
  content: "↗"; font-size: .72em; margin-left: 3px; opacity: .55;
}
.md a.img-zoom { border-bottom: 0; }

.h-anchor {
  margin-left: 10px; opacity: 0;
  color: var(--text-3); font-weight: 400; text-decoration: none;
  border-bottom: 0 !important;
  transition: opacity .15s;
}
.md h1:hover .h-anchor, .md h2:hover .h-anchor,
.md h3:hover .h-anchor, .md h4:hover .h-anchor { opacity: 1; }
.h-anchor:hover { color: var(--brand-1) !important; }

.md ul, .md ol { margin: 14px 0; padding-left: 1.5em; display: flex; flex-direction: column; gap: 8px; }
.md ul { list-style: none; }
.md ul > li { position: relative; padding-left: 4px; }
.md ul > li::before {
  content: ""; position: absolute; left: -1.05em; top: .66em;
  width: 6px; height: 6px; border-radius: 2px;
  background: linear-gradient(135deg, var(--brand-1), var(--brand-2));
  opacity: .8;
}
.md ol > li::marker { color: var(--brand-2); font-weight: 600; font-family: var(--font-mono); font-size: .9em; }
.md li > ul, .md li > ol { margin: 8px 0 0; }

.md hr { border: 0; border-top: 1px solid rgba(148, 178, 255, .12); margin: 48px 0; }

/* 行内代码 */
.md code {
  font-family: var(--font-mono); font-size: .86em;
  background: rgba(79, 140, 255, .1);
  border: 1px solid rgba(79, 140, 255, .16);
  color: #9ecbff;
  padding: 2px 7px; border-radius: 6px;
  word-break: break-word;
}
.md .code-block code { background: none; border: 0; padding: 0; color: #c9d6f0; font-size: 13.5px; }
.md .code-block { margin: 18px 0; }

/* 表格 */
.md .table-wrap {
  margin: 20px 0;
  border: 1px solid var(--border);
  border-radius: 13px;
  overflow-x: auto;
  background: rgba(148, 178, 255, .025);
}
.md table { border-collapse: collapse; width: 100%; font-size: 13.5px; }
.md th, .md td { padding: 11px 16px; text-align: left; vertical-align: top; border-bottom: 1px solid rgba(148, 178, 255, .09); }
.md thead th {
  background: rgba(148, 178, 255, .06);
  color: var(--text-1); font-weight: 650; white-space: nowrap;
}
.md tbody tr:last-child td { border-bottom: 0; }
.md tbody tr:hover td { background: rgba(148, 178, 255, .035); }
.md td strong { color: var(--text-1); }

/* 引用块 */
.md .md-quote {
  margin: 20px 0; padding: 14px 20px;
  border-left: 3px solid;
  border-image: linear-gradient(180deg, var(--brand-1), var(--brand-2)) 1;
  border-radius: 0 12px 12px 0;
  background: linear-gradient(90deg, rgba(79, 140, 255, .07), rgba(79, 140, 255, .015));
  color: var(--text-2);
}
.md .md-quote p { margin: 6px 0; }
.md .md-quote strong { color: var(--text-1); }

/* 图片 */
.md p > img, .md a img, .md > img {
  margin: 18px 0;
  border-radius: 12px;
  border: 1px solid var(--border-strong);
  box-shadow: 0 20px 60px -24px rgba(2, 8, 20, .8);
}
.md a.img-zoom { display: inline-block; transition: transform .25s ease; }
.md a.img-zoom:hover { transform: translateY(-3px); }

/* mermaid 图 */
.md .diagram { padding-bottom: 8px; }
.md .mermaid-target { display: none; padding: 18px 10px 6px; overflow-x: auto; }
.md .diagram.rendered .mermaid-target { display: block; }
.md .diagram.rendered .mermaid-fallback { display: none; }
.md .mermaid-target svg { max-width: 100%; height: auto; background: transparent; }
.md .mermaid-fallback { margin: 0; padding: 16px 18px !important; }

/* 回到顶部 */
.back-top {
  position: fixed; right: 26px; bottom: 26px; z-index: 90;
  width: 44px; height: 44px; border-radius: 12px;
  background: rgba(10, 16, 30, .9);
  border: 1px solid var(--border-strong);
  color: var(--text-2);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none; transform: translateY(8px);
  transition: opacity .2s, transform .2s, color .15s, border-color .15s;
}
.back-top.show { opacity: 1; pointer-events: auto; transform: none; }
.back-top:hover { color: var(--text-1); border-color: rgba(148, 178, 255, .45); }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .docs-layout { grid-template-columns: 1fr; gap: 0; padding-top: calc(var(--nav-h) + 28px); }
  .docs-side {
    position: fixed; inset: 0; z-index: 95;
    max-height: none; height: 100%;
    background: rgba(4, 6, 13, .92);
    backdrop-filter: blur(16px);
    padding: 24px;
    display: none;
  }
  .docs-side.open { display: block; overflow-y: auto; }
  .toc-box { max-height: none; border: 0; background: none; padding: 0; }
  .toc a { font-size: 15px; padding: 9px 12px; }
  .toc a.toc-3 { padding-left: 28px; font-size: 14px; }
  .toc-toggle { display: flex; }
  .md h2 { margin-top: 52px; }
}